ulmer



(No Model.) 7 I A. M. ULMER 8; F. FOWLER BRAKING MECHANISM FORMACHINERY." No. 267,953. Patented Nov. 21, 18-82 FIGJ WITkVESSSQ INVENTORS .UNITED STATES PATENT OFFICE.

BRAKING MECHANISM FOR MACHINERY.

SPECIFICATION forming 1 is gradually slackened prior to the stoppage ofits movement, the invention being of especial importance in cases wherethe movement of the wheel is checked by contact of a portion of saidwheel with a fixedstop, the object of our invention being to prevent thesevere shock andrecoil due to the sudden stoppage of the wheel when itis rotating at full speed.

In the accompanying drawings, Figure l is a view showing our improvementapplied to the feed-roll-operating mechanism of a spinning-mule Fig. 2,a sectional view of the device forming the subject of our invention,said view being drawn to a larger scale than Fig. 1; and Fig. 3, aperspective view of the device. Before describing our invention, we willfirst give a general description of that part of a spinning-mule whichis shown in Fig. 1, in order that a better understanding may be had ofthe nature and object of our improvement.

AA represent parts of the frame of the mule, in whichare formed bearingsfor the main drivin g-shaft B, and for one ofthe rolls D, whereby theslubbing is fed into the machine. This feed-roll must have anintermittent movement imparted to it-that is to say, it must feed theslubbing forward during the first part of the movement of the carriage,and must then be held stationary while the drawing, spinning, andwinding operations are being performed. These movements of the feed-rollare effected in the following manner:

On the roll D is a loose sleeve, E, which is driven in any suitablemanner from the main shaft. On this sleewe is a clutch, a, adapted toengage with a clutch, b, secured to the feedroll, on which is a similarclutch, d, adapted to engage with a clutch, e, ona pinion, F, which canturn loosely on the roll D. The pinion F gears into a spur-wheel, G, thehub of which is threaded internally, and is adapted to a part of LettersPatent No, 267,953, dated November 21, 1882. Application filed September29, 1882. (No model.) I

screw-spindle, J, projecting from the frame A. The wheel G is secured toor forms part of a drunnM, to which is attached one end of a cord,f,said cord passing over a pulley, g, and having at the opposite end aweight, h. On one side of the wheel G is alug, m, and on the oppositeside a lug, a, and on the frame A is a projecting arm, 19, as shown inFig. 1.

To a suitable bearing on theframe is pivoted a lever, N, which serves asa catch to hold the clutches b and d in gear with the clutches a and c,the clutches being thrown out of gear by suitable mechanism whenreleased from the control of the lever.

When the feed-roll D is stationary the lug m on the wheel G is incontact with the projecting arm 19, the cordfis unwound from the drum M,and the clutches are out of gear. As soon as the clutches are throwninto gear and locked by the lever N the wheel G is rotated by the pinionF,-so as to traverse onthe screwspindle J in the direction of the arrow1, Fig. 1, thus winding up the cord on the drum M. The traversingmovement continues until the lug a on the wheel comes into contact witha finger, t, on the lever N, when said lever will be operated so as torelease the clutches, whereupon the rotation of the feed-roll D willcease, the finger t being adjustable on the lever, so that any desiredextent of movement of the feed-roll may be permitted before theoperation of the lever and the stoppage of said movement. The pinion Fbeing now free from the roll, the weight on the cordfwill cause the sameto be unwound from the drum M, thereby turning the wheel G and causingit to traverse on the screw-spindle in the direction of the arrow 2,this movement continuing until the lug m comes into contact with the armp. The contact of the lug m with the arm while the wheel G is rapidlyrotating causes such a shock that injury to the machinery is thefrequent result, the commonest accident being the breaking off of theteeth of the wheel G and pinion F, so that frequent stoppages of themule are required for the repair or replacing of these parts. Therecoilof the wheel on the contact of the lug m and arm 19 is anotherobjection, as it causes the wheel G on its next operation to start inadvance of the proper position, so'that the IOC) length of slubbing fedin is shorter than it should be, and imperfect yarn is the result. It isthese objections which it is the aim of our invention toovercome, and weattain the desired result .by gradually retarding the rotation of thewheel G as it approaches the limit of its movement in the direction ofthe arrow 2. This is effected by means of a friction-block, 'w, the stemy of which is adapted to slide in a recessed bearing, T, on the frame, aspring, 0:, tending to force the block 20 outward, and a transverse pin,8, in the bearing being adapted to a recess in the stem, y, so as tolimit the extent of said outward movement. As the wheel Gr approachesthe limit of its movement in the direction of the arrow 2 the block towill come into frictional contact with the face of the wheel, and'as thelatter con-- tinues its movement the block will be forced inward, andthe spring mwill be compressed so as to gradually increase the friction,and thus gradually retard the speed of the wheel, so that when the 'lugm comes into contact with the arm p the speed will have been so farreduced that no severe shock will result and no recoil will take place.

Ourinvention is applicable to other machines than spinning-mules. Forinstance, it may be used in connection with the feed-rolls of differentmachines, or with the feeding devices of wood or metal working machines,or with the rotating and traversing plunger of a press, and in some ofthese cases the brake alone the wheel, no fixed stop being used. It is,however, of special advantage in cases where such a fixed stop isemployed.

We claim as our invention- 1. The combination of the rotating andtraversing wheel G with a brake, w, adapted to yield in the direction ofthe traverse of the wheel, whereby a gradually-increasing pressmay berelied upon to stop the.movement of ure is brought to bear on the wheelas it nears the end of its movement, as set forth.

2. The combination of the rotating and traversing wheel G, having a lug,m, thefixed stop 19, and the brake 20, adapted to yield in the directionof the traverse of the wheel, as set forth.

3. The combination of the spur-wheel G, its drum M and lug m,the stop19, the screw-spindle J, the pinion F, and the brake w, as set forth.

4. The combination of the rotating and traversing wheel G, the bearingT, the brakeblock 10, having a stem adapted to slide in the bearing, anda spring, at, as set forth.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnes es.

AMOS M. ULMER. FRANK FOWLER.

Witnesses:

HARRY DRURY, HARRY SMITH.

